Sink



FIG. 1 is a top perspective view of a sink showing my new design;

FIG. 2 is a top plan view shown on a reduced scale thereof;

FIG. 3 is a front elevation view shown on a reduced scale thereof;

FIG. 4 is a rear elevation view shown on a reduced scale thereof;

FIG. 5 is a left side elevation view shown on a reduced scale thereof;

FIG. 6 is a right side elevation view shown on a reduced scale thereof; and,

FIG. 7 is bottom plan view shown on a reduced scale thereof. 

The ornamental design for a sink, as shown and described. 